<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no"/>
  <meta name="renderer" content="webkit">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="author" content="">
  <meta name="keyword" content="">
  <meta name="description" content="">
  <title>demo</title>
</head>
<style>
  * {
    padding: 0;
    margin: 0;
  }
</style>
<body>

<div class="wrapper">
  this is a demo
</div>
</body>
</html>